Pen



FIG. 1 is a perspective view of a pen;

FIG. 2 is another perspective view thereof with the writing tip shown extended;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof, a left side view being a mirror image of the right side view;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a sectional view thereof, taken along line 8—8 of FIG. 3 with an outline of a refill and other inside parts.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a pen, as shown and described. 